Expert Answer
Magnesium glycinate vs threonate - which is better for sleep?
By Arun Agrahri Last reviewed 2 timecoded sources
Quick Answer
For sleep, glycinate is the form the panel leans on. It absorbs well, sits easy on the gut and supports relaxation and GABA activity. Patrick recommends glycinate or malate, and files threonate under brain rather than sleep. Its elemental magnesium is too low to count toward daily needs. Huberman's sleep cocktail pairs magnesium with theanine and apigenin.
Strong Consensus
on Magnesium overall
What the Panel Says
Includes magnesium (threonate or glycinate) in his sleep cocktail alongside L-theanine and apigenin; magnesium supports muscle relaxation and GABA activity.
“I was asked, do magnesium need to be taken with or without food or before sleep? If you're going to go that route it should be taken 30 to 60 minutes before sleep, 'cause it's designed to make you sleepy.”
Andrew Huberman, on the record @ 01:01:22
Recommends glycinate or malate for bioavailability. Cautions that threonate's low elemental magnesium should not count toward your daily allowance. Files threonate under brain health, not sleep.
“so in humans it's been found that even an increase up to 300% in blood magnesium results in less than 19% change in the cerebral spinal fluid magnesium content”
Rhonda Patrick, on the record @ 15:46
Chases a total elemental dose rather than a sleep-specific form - rotates SlowMag, L-threonate and oxide to about a gram a day.
Treats magnesium as foundational and pairs theanine with magnesium to support sleep (e.g. when quitting alcohol).
Blueprint does not itemize magnesium, so there is no direct stance on form.
Detailed Answer
Seller pages frame this as "glycinate for the body, threonate for deep sleep." The expert data does not back that. No tracked expert singles out threonate as a sleep form. For sleep, glycinate is the one that comes up.
Rhonda Patrick recommends glycinate or malate for bioavailability. Magnesium's calming effect runs through muscle relaxation and GABA activity.
Threonate is where the seller framing breaks. It holds little elemental magnesium. Patrick says it should not count toward your recommended daily allowance.
She files threonate under brain and cognition, where researchers have studied it for raising brain magnesium. It is not a sleep form. So if you take threonate for cognition, you still need a separate daily magnesium source.
Huberman puts magnesium in his sleep cocktail alongside L-theanine and apigenin. He uses either threonate or glycinate. Magnesium handles relaxation.
Theanine calms without sedation. Apigenin brings anxiety down. Attia does not treat form as a sleep decision.
He rotates SlowMag, L-threonate and oxide to reach roughly a gram of elemental magnesium a day. His nightly stack is ashwagandha and glycine, with magnesium sitting in the daily protocol instead of the sleep one. Hyman pairs theanine with magnesium for sleep support.
Start with glycinate for sleep. It absorbs well, sits easy and works on relaxation. Add threonate only if cognitive recovery is the goal, and do not count it toward your daily magnesium.
Related Questions
Does magnesium threonate help you sleep?
No tracked expert singles out threonate for sleep. Patrick frames it as a brain/cognitive form and warns its elemental magnesium is too low to count toward daily needs; glycinate is the form experts lean on for sleep.
Which magnesium does Huberman take for sleep?
Magnesium (threonate or glycinate) as part of his sleep cocktail with L-theanine and apigenin, taken 30-60 minutes before bed.
Can you take glycinate and threonate together?
Yes - a common approach is threonate for daytime cognitive support and glycinate before bed for relaxation. Only glycinate's elemental magnesium meaningfully counts toward your daily intake.
How much magnesium glycinate for sleep?
Experts cite roughly 300-500mg elemental magnesium daily across forms (Attia 300-500mg; Patrick ~400mg); take an evening dose for sleep and start low to avoid GI effects.
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